Originally Posted by
Bikearound
It doesn't matter whether you buy a 56 CM or the 58 CM frame as you can swap out the stem to adjust for the proper reach. The size difference of only 2 CM is nothing so if stand over height isn't an issue then you could buy either one.
The guy is 5'10" tall. Unless he's got arms like an ape a 58 is going to be huge. The 58 really 58.6... so it's closer to a 59.
Even the 54 has a longer TT than my old Jamis Aurora in a true 55. Really look at the geometry of the Surly bikes close.